3/4 inch Bronze Compression Union Compression x Compression

3/4 inch Compression Union – Lead-Free Brass for Potable Water Applications

The 3/4 inch Compression Lead-Free Union is a mechanical fitting designed to join two sections of 3/4-inch copper, CPVC, or PEX tubing without the need for soldering or special heat tools. This union allows for quick disassembly and reassembly, making it especially useful in service and repair applications where future access may be necessary.

Manufactured from lead-free brass to meet federal and state potable water standards, this compression union is ideal for use in residential and commercial water supply systems. It is suitable for both cold and hot water lines and is designed to maintain mechanical integrity under working pressures up to 125 psi at ambient temperatures (and higher with appropriate ratings).

Technical Specifications

• Nominal Size: 3/4 inch
• Connection Type: Compression x Compression
• Material: Lead-Free Brass (compliant with NSF/ANSI 61 and 372)
• Maximum Working Pressure: 125 psi
• Temperature Range: 33°F to 180°F (cold and hot water systems)
• Conformance: ANSI/ASME B1.20.1 and federal lead-free plumbing mandates

Product Advantages

• ✅ Code-Compliant Construction – Made from lead-free brass to meet Safe Drinking Water Act (SDWA) requirements.
• ✅ Reusable Assembly – Union design allows for disconnection and reconnection without cutting pipe.
• ✅ Reliable Sealing – Designed with compression ferrules that form a tight, leak-resistant joint.
• ✅ No Heat Required – Installs without solder, ideal for applications where open flame is prohibited or impractical.
• ✅ Application Flexibility – Suitable for use in both residential and commercial systems involving copper, CPVC, or PEX lines (with appropriate inserts where required).

Installation Considerations

Ensure tubing is cut square, deburred, and fully inserted into the fitting body before tightening the nut. Apply consistent torque to compress the ferrule onto the pipe. Over-tightening may deform the ferrule or tubing. Use manufacturer-recommended installation procedures for best results. Pipe dope or PTFE tape is not typically required for compression threads but may be used on male threads when applicable.

Common Applications

This union is frequently used in plumbing layouts where disassembly is expected or in areas with limited access. It is suitable for use in fixture installations, branch lines, water heater tie-ins, and maintenance bypass configurations in hydronic or potable water systems.

Note

Always verify material compatibility with pipe type and application pressure. Not intended for gas service or high-pressure steam systems.

The 3/4 inch Compression Lead-Free Union offers a clean, code-compliant solution for joining water lines where flexibility and serviceability are important. Its lead-free construction ensures it meets all potable water standards, while its mechanical design streamlines installation and future maintenance.